Casebook 2011: Automatic guided vehicles replaces aging rail car

Super-sized, specially designed AGV handles wide loads for manufacturer of naval and commercial vessels.

By ·

Northrop Grumman, a designer and builder of nuclear-powered aircraft carriers and submarines and provider of aftermarket services to an array of naval and commercial vessels, was having trouble locating parts for its rail car and maintenance costs were escalating. When expanding its facility in 2004, instead of going with the aged rail car technology it was using, engineers installed an automatic guided vehicle (AGV; Jervis B. Webb Company, 248-553-1000, http://www.jervisbwebb.com) with far more locomotion.

Prior to 2004, the company used a roller conveyor that carried primed plates from the plate prep building to a 30-year-old rail car that carried plates to each of six trimming stations. As production increased, the company built an additional station in another facility that would have required the rail car to travel a 90-degree bend.

Instead, the company installed a new, laser-guided AGV to replace the rail car. The battery-powered AGV not only replaced embedded steel rails in the floor, but also the trailing AC cord apparatus. With four-wheel drive and independent steering, the new AGV travels in any direction, inside and outside the facility. The AGV operates automatically according to programmed instructions from the operator, using laser-scanning system at each end of the vehicle to detect people and objects.

The company’s new plate transport system moves large steel plates varying from 3/16 of an inch to 2 inches thick and up to 14 feet wide by 50 feet long. The largest of these plates can weigh nearly 20 tons. The AGV is capable of straddling a stack of plates up to 18 inches high, allowing it to travel over the stack to deliver to other locations.

“The uniqueness of this AGV is that it has a powered roller deck on top to roll the plates off,” says project engineer John Chilbert, who also says the company is considering other possible AGV applications. “As we replace our older materials handling systems, we want to replace them with the best new technology available.”


About the Author

Josh Bond, Contributing Editor
Josh Bond is Senior Editor for Modern, and was formerly Modern’s lift truck columnist and associate editor. He has a degree in Journalism from Keene State College and has studied business management at Franklin Pierce University.

Subscribe to Modern Materials Handling Magazine!

Subscribe today. It's FREE!
Find out what the world’s most innovative companies are doing to improve productivity in their plants and distribution centers.
Start your FREE subscription today!

Latest Whitepaper
Download the full 2016 Modern Materials Handling Salary Survey
How does your earning power match up with your peers across the material handling industry? Materials Handling salary survey, Warehouse manager salary survey, Warehouse Salary Research
Download Today!
From the November 2016 Issue
In Whirlpool Corp.’s Clyde, Ohio, factory, mobile robots have automated the delivery of parts to the line. The result is a more consistent, efficient and safer operation.
Optimizing home delivery: It takes more than planning
9th Annual Salary Survey: Success and Satisfaction Continue to Reign
View More From this Issue
Subscribe to Our Email Newsletter
Sign up today to receive our FREE, weekly email newsletter!
Latest Webcast
2016 Warehouse/DC Operations Webcast: Confronting omni-channel complexity
During this webcast we’ll examine the current activities, trends, and best practices in warehouse and DC operations management and how companies plan to address complex issues associate with omni-channel fulfillment.
Register Today!
EDITORS' PICKS
Systems Report: Whirpool puts mobile robots to work
In Whirlpool Corp.’s Clyde, Ohio, factory, mobile robots have automated the delivery of parts to...
Modern Materials Handling’s 2017 Casebook Collection
The 2017 Casebook features more than 35 case studies that put the spotlight on successful innovation...

Brownells: Designing for Efficiency and Growth
Brownells’ new Iowa distribution center has taken touches—and miles—out of the order...
Industry celebrates National Manufacturing Day
Fourth annual Manufacturing Day is a grassroots effort by U.S. manufacturers to improve the public...